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A junction, when discussed in the context of transport, is a location where traffic can change between different routes, directions, or sometimes modes, of travel.
A junction, in the context of rail transport, is a place at which two or more rail routes converge or diverge. The physical connection between the tracks of the two routes (assuming they are of the same gauge) is provided by turnouts (US: switches ) and signalling .
Roads began as a means of linking locations of interest: towns, forts and geographic features such as river fords.Where roads met outside of an existing settlement, these junctions often led to a new settlement.
A three-way intersection is a junction between three road segments (arms): a T junction when two arms form one road, or a Y junction, the latter also known as a fork if approached from the stem of the Y. Fork in the road Y-junction. A four-way intersection, or crossroads, usually involves a crossing over of two streets or roads.
Cell junction, a class of cellular structures in biology Electrical junction , a point or area where multiple conductors or semiconductors make physical contact Junction (hackathon) , an event in Helsinki, Finland
An associative (or junction) table maps two or more tables together by referencing the primary keys (PK) of each data table. In effect, it contains a number of foreign keys (FK), each in a many-to-one relationship from the junction table to the individual data tables. The PK of the associative table is typically composed of the FK columns ...
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A junction that connects a controlled-access facility to a lower-order facility, such as an arterial or collector road. [ 4 ] The mainline is the controlled-access highway in a service interchange, while the crossroad is the lower-order facility that often includes at-grade intersections or roundabouts, which may pass over or under the mainline.